RK1528HN-VRT-VX | Pump VRT Unloader, 4 GPM 4000 PSI, 24mm Shaft

RK1528HN-VRT-VX by Annovi Reverberi — RK Series Triplex Plunger Pump with Nickel Plated Brass Head, Viton VX Seals, and VRT Unloader | 4.0 GPM | 4,000 PSI | 24mm Solid Keyed Shaft | 1,450 RPM | Chemical-Duty Engineered

The RK1528HN-VRT-VX by Annovi Reverberi is a professional-grade RK Series triplex ceramic plunger pump engineered for chemical-intensive, continuous-duty pressure washing applications requiring 4.0 GPM at 4,000 PSI with maximum resistance to aggressive detergents, sanitizers, degreasers, and high operating temperatures. Rated at 4.0 GPM and 4,000 PSI at 1,450 RPM, the RK1528HN-VRT-VX delivers 16,000 cleaning units — combining 4.0 GPM high-volume output with 4,000 PSI cleaning force for graffiti removal, professional pressure washing contractors, food processing and sanitation facilities, agricultural equipment cleaning, construction site maintenance, and mobile wash systems — through a zinc-plated Nickel Plated Brass Head manifold, solid ceramic plungers, Viton VX chemical-resistant seals, a factory-installed VRT unloader, and a 24mm solid keyed shaft for direct drive and belt drive coupling. As part of Annovi Reverberi’s pump and unloader assemblies stocked and supported by WSHPWR, the RK1528HN-VRT-VX is the correct specification when the cleaning environment involves chemicals that destroy standard seals.

The RK1528HN-VRT-VX combines three specification upgrades that work together to protect the pump in chemically demanding environments: the H Nickel Plated Brass Head for manifold corrosion resistance, the VX Viton seals for plunger packing that resists aggressive chemistry, and the factory-installed VRT unloader for stable pressure regulation at 1,450 RPM low-speed operation. Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated technical support — this pump arrives pre-filled with factory break-in oil, factory-tested, and ready for installation. Protected by a 5-year commercial warranty and built to be fully rebuilt rather than replaced, the RK1528HN-VRT-VX is a long-term investment capable of a decade of productive service life in environments where standard pump specifications fail prematurely.

Factory-Matched and Approved — The RK1528HN-VRT-VX Complete Assembly Advantage

No Mismatches. No Guesswork. No Warranty Risk. Just Install and Run.

Every RK1528HN-VRT-VX ships as a factory-matched, factory-approved, and factory-installed complete pump and unloader assembly:

• Factory-matched VRT unloader for 4,000 PSI — the VRT unloader is factory-calibrated for this pump’s 4.0 GPM / 4,000 PSI duty point at 1,450 RPM. Pressure regulation and bypass characteristics are factory-set as a complete system.
• Factory-approved VX Viton seal specification — the Viton seal set is the factory-approved packing specification for this model’s chemical-duty operating environment. Operating with the factory-installed VX seals maintains full 5-year commercial warranty coverage.
• Factory-installed and tested — every RK1528HN-VRT-VX exits the manufacturing facility with the VRT assembly mounted, calibrated, and tested for flow, pressure, and leak-free operation before shipment.
• Eliminates mismatch returns — the factory-matched assembly eliminates incorrect unloader specification before the pump leaves the box.
• Installation-ready — mount via the 24mm solid keyed shaft, connect system hoses, and start. The RK1528HN-VRT-VX arrives engineered, assembled, and ready.

Decoding the RK1528HN-VRT-VX Model Number

What Every Segment of This Annovi Reverberi Pump Designation Tells You

• RK — Pump series: RK Series triplex plunger pump — Annovi Reverberi’s compact commercial low-speed pump platform
• 15 — Pump series identifier for this RK configuration
• 28 — Maximum pressure: 4,000 PSI — 4.0 × 2,800 = 16,000 cleaning units
• H — Head construction: Nickel Plated Brass Head — zinc-plated nickel plating applied over forged brass manifold for enhanced corrosion resistance in chemical-intensive cleaning environments
• N — Shaft type: Natural solid shaft — 24mm solid keyed crankshaft for direct drive and belt drive coupling
• VRT — Unloader family: VRT Series — factory-installed adjustable unloader for stable pressure regulation and safe bypass at 1,450 RPM low-speed operation
• VX — Seal specification: Viton seals — fluoroelastomer packing material engineered for chemical resistance, heat resistance, and extended service life in aggressive detergent, sanitizer, solvent, and high-temperature washing applications

VX Viton Seals — Why Seal Material Is the Critical Specification in Chemical Environments

Viton Fluoroelastomer. Chemical Resistant. Heat Resistant. Lasts Where Standard Seals Fail.

The VX designation on the RK1528HN-VRT-VX identifies a seal specification that fundamentally changes service life in chemical-intensive cleaning programs — and understanding why is the key to knowing whether this pump is the correct specification for your application:

• What Viton (VX) seals are — Viton is a fluoroelastomer — a synthetic rubber with fluorine-carbon bonds that are significantly more chemically stable than the carbon-hydrogen bonds in standard EPDM or NBR seal materials. The VX seals on the RK1528HN-VRT-VX resist breakdown from acids, alkalis, petroleum-based degreasers, solvents, chlorine-based sanitizers, and the wide range of industrial and commercial cleaning chemistries that cause premature swelling, hardening, or deterioration in standard seal materials.
• Heat resistance beyond standard seals — Viton seals maintain sealing integrity at operating temperatures that cause standard EPDM seals to soften and fail. For the RK1528HN-VRT-VX running in food processing facilities, industrial wash stations, and enclosed equipment environments where water temperature is elevated, the VX Viton seals provide a meaningful safety margin that standard packing cannot match.
• Applications where VX Viton seals are the required specification — food and beverage facility sanitation using caustic soda, acid rinse, or chlorinated sanitizers; graffiti removal using solvent-based stripping chemistry; industrial degreasing with petroleum solvent degreasers; agricultural chemical residue washdown; and any application where the cleaning solution contains chemistry that is known to shorten standard seal service life.
• Applications where standard seals are adequate — clean water washing, light detergent use, and pressure washing programs that do not involve aggressive chemical contact. If your cleaning program only uses mild soap and water, the VX upgrade is not required. If your program involves the chemistries listed above, standard seals will fail prematurely and the RK1528HN-VRT-VX is the correct specification.

H — Nickel Plated Brass Head and Zinc-Plated Manifold

Two Layers of Corrosion Protection. Built for Daily Chemical Contact.

• Zinc-plated Nickel Plated Brass Head manifold — the RK1528HN-VRT-VX’s manifold combines forged brass construction with zinc plating and nickel treatment, providing multiple layers of corrosion protection against the chemical environments that standard brass manifolds cannot withstand over extended service intervals
• Works in combination with VX Viton seals — the H nickel plated head and VX Viton seals on the RK1528HN-VRT-VX address chemical attack from both directions: the manifold resists corrosive chemistry in the water passages, and the Viton packing resists chemical degradation at the plunger sealing surface. Both are required for a complete chemical-duty specification at 4.0 GPM / 4,000 PSI.

Key Specifications

RK1528HN-VRT-VX Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute / 15 L/min)
• Maximum Pressure: 4,000 PSI
• Cleaning Units: 16,000 (GPM × PSI)
• Operating Speed: 1,450 RPM — low-speed operation for reduced heat and extended component life
• Pump Type: RK Series triplex ceramic plunger pump — smooth, low-pulsation output
• Drive Type: Belt drive and direct drive — 24mm solid keyed shaft
• Shaft: 24mm solid keyed (N designation)
• Head Material: Zinc-plated Nickel Plated Brass Head (H designation) — multi-layer corrosion resistance for chemical-intensive environments
• Manifold: Forged brass with zinc plating — durability and chemical corrosion resistance
• Plungers: Solid ceramic — extended wear resistance
• Seals: VX Viton fluoroelastomer — chemical and heat resistance for aggressive detergent and sanitizer applications
• Unloader: VRT Series — factory-installed, stable pressure regulation and safe bypass at 1,450 RPM
• Serviceability: Oil sight glass and vented dipstick for simplified routine maintenance
• Lubrication: Oil-bath crankcase with factory pre-filled break-in oil
• Documentation: Owner’s manual, test sheet, and performance documentation included
• Chemical Injector: Not included — chemical delivery managed externally
• Warranty: 5-year commercial warranty — US-based coverage through Annovi Reverberi North America

What’s Included in the Box

A Complete, Factory-Configured RK1528HN-VRT-VX Assembly Ready for Installation

• Factory-installed VRT adjustable unloader — calibrated for the 4.0 GPM / 4,000 PSI / 1,450 RPM operating point; stable pressure regulation and safe bypass confirmed
• VX Viton fluoroelastomer seals — factory-installed chemical-duty packing specification; chemical and heat resistant
• Factory break-in oil — crankcase pre-filled for first startup
• Oil sight glass and vented dipstick — at-a-glance monitoring and crankcase ventilation
• Owner’s manual, test sheet, and performance documentation — installation, operating, service, and rebuild procedures with Annovi Reverberi part numbers; factory performance documentation for service records and compliance requirements

1,450 RPM Low-Speed Operation — Extended Life in Demanding Environments

Cooler Running. Reduced Wear. Better Suited for Enclosed and Chemical-Intensive Installations.

• 1,450 RPM for reduced heat generation — the RK1528HN-VRT-VX’s low-speed operation reduces heat buildup at the plunger-seal interface — a critical advantage in chemical-intensive environments where elevated temperatures accelerate seal degradation even in Viton compounds
• Extended seal service intervals at low speed — the combination of low-speed operation and VX Viton seals on the RK1528HN-VRT-VX produces the longest achievable seal service intervals in demanding chemical washing programs
• Compatible with direct drive and belt drive — the 24mm solid keyed shaft supports both direct drive motor coupling and belt drive configurations, giving OEM builders and contractors flexibility in system design

Typical Applications

Where the RK1528HN-VRT-VX Is the Required Specification

• Food processing and sanitation facilities — the RK1528HN-VRT-VX’s VX Viton seals and nickel plated brass head are purpose-built for the caustic soda, chlorinated sanitizers, and acid rinse chemistry used in food and beverage facility washdown programs where standard seal materials fail prematurely
• Graffiti removal and paint stripping — solvent-based graffiti removal chemistry and paint strippers attack standard EPDM and NBR seals within weeks of regular use. The RK1528HN-VRT-VX’s Viton VX seals maintain integrity under repeated solvent contact across the pump’s commercial service life
• Industrial degreasing and chemical washdown — petroleum-based degreasers, parts washing solvents, and industrial cleaning compounds that require chemical-resistant pump seals for sustained professional use
• Agricultural equipment cleaning — fertilizer residue, pesticide washdown, and agricultural chemical contact where Viton seals provide the chemical resistance that standard pump seals cannot deliver across a full growing season
• Mobile wash trailers and van setups — contractors running chemical pre-treatment programs, multi-chemistry cleaning accounts, or specialized surface cleaning where seal longevity in chemical environments is an operational requirement
• Fire station and emergency vehicle cleaning — frequent high-pressure use with varied cleaning chemistry where the RK1528HN-VRT-VX’s Viton seals and low-speed durability support extended daily service intervals

5-Year Commercial Warranty, Full Rebuildability, and Wholesale Pricing

Chemical-Duty Specification. Backed for Five Years. Parts Available Nationally.

The RK1528HN-VRT-VX is protected by Annovi Reverberi’s 5-year commercial warranty through the US-based warranty and service network. Every internal wear component — solid ceramic plungers, zinc-plated nickel plated brass head seals, VX Viton packing kits, VRT unloader service parts, and crankcase bearings — is stocked nationally through authorized AR North America distribution channels. Contractors, facility managers, fleet operators, food processing operations, OEM equipment builders, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RK1528HN-VRT-VX and the complete Annovi Reverberi pump and unloader assembly line. WSHPWR maintains one of the most complete Annovi Reverberi inventories available through any US web store — with thousands of products in stock and a continually expanding catalog.

16,000 Cleaning Units. 4,000 PSI. 4.0 GPM. Viton VX Seals. Nickel Plated Brass Head. VRT Unloader. 1,450 RPM. Chemical-Duty Ready.

Italian Engineering. Chemical-Resistant Specification. Factory-Approved VX Viton Assembly. 5-Year Commercial Warranty.

For contractors, facility managers, food processing operations, agricultural teams, and industrial operators who run aggressive chemistry through their pressure washing systems daily — and have watched standard seals fail prematurely — the RK1528HN-VRT-VX is the correct specification. Viton VX fluoroelastomer seals. Zinc-plated Nickel Plated Brass Head. VRT unloader. Solid ceramic plungers. 1,450 RPM low-speed operation. 4.0 GPM at 4,000 PSI. Factory performance documentation. Five-year commercial warranty. A decade of service life in environments where standard pumps are replaced annually.

Volume buyers can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing for quantity purchases across the complete Annovi Reverberi lineup.